<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
        * {
            padding: 0px;
            margin: 0;
            box-sizing: border-box;
        }
        
        html,
        body {
            width: 100%;
            height: 100%;
            background: linear-gradient(to bottom, #f0f2f0, #000c40);
        }
        
        .container {
            width: 358px;
            height: 388px;
            background: #FFFFFF;
            border-radius: 6px;
            box-shadow: 0 14px 28px rgba(0, 0, 0, 0.25), 0 10px 10px rgba(0, 0, 0, 0.22);
            overflow: hidden;
            position: absolute;
            left: 50%;
            top: 50%;
            margin-left: -179px;
            margin-top: -194px;
            border-top: 8px solid #409EFF;
        }
        
        .img-div {
            position: absolute;
            top: 50%;
            left: 50%;
            margin-left: -37px;
            margin-top: -36px;
        }
        
        .img {
            height: 25%;
            width: 100%;
            position: relative;
        }
        
        .tittle {
            height: 15%;
            text-align: center;
            font-size: 2em;
            color: #409EFF;
        }
        
        .input-div {
            height: 60%;
          
        }
        form{
            position: relative;
        }
        
        input {
            outline: none;
            background: #F3F4F5;
            width: 328px;
            height: 40px;
            padding: 6px 7px;
            margin: 10px 15px;
            border-radius: 6px;
            border: 1px solid #A18CD1;
            transition: 500ms;
            font-size: 13px;
        }
        
        input[type=submit] {
            background: #409EFF;
            border: none;
        }
    </style>
<script src="js/manage.js"></script>
</head>

<body>
    <div class="container">
        <div class="img">
            <div class="img-div"><img src="img\QQ截图20190907201136.png" alt=""></div>
        </div>
        <div class="tittle">
            system-admin-web
        </div>
      
        <div class="input-div">
        <form action="manger.php" onsubmit="return checkForm()">
                <input type="text" id="username" placeholder="用户名" onblur="checkusername()">
                <input type="password" id="password" placeholder="密码" onblur="checkpassword()">
                <input type="submit" value="登录">
                </form>

        </div>
       

    </div>
</body>

</html>